Performance sequences convey characters' internal emotional states rather than serving as simple technical showcase.
The back half deals directly with loss in ways that contrast with the brighter opening episodes — a well-documented, consistent reaction.
Yes, notably — it's one of the most consistently cited anime for emotional impact around grief and loss, particularly in its back half, despite a brighter opening tone.
No — the performance sequences are framed around characters' emotional states rather than requiring technical musical understanding to appreciate.